The one-pot method is an extremely flammable mix of several chemicals and the residue left behind is toxic. Since there are no laws on the books in Vermont or New York regulating the cleanup process of a meth lab is the responsibility of the property owner.

In fact, there is not even a requirement to remove the hazardous residue that could cause health problems for children and adults.

And as Newschannel 5 found out, the toxicity levels can be extremely high.

McDonald says she had no idea that her tenant of five years was cooking meth in the apartment he was renting from her.

New York State troopers raided the Mooers, New York apartment in August of 2012 and found a working one-pot meth lab inside the upstairs bathroom.

“It wasn't until later that they told us it was that. I can't pronounce the word well,” McDonald said.

We asked if she meant methamphetamine and she said she did. She hasn't been able to rent the place since.

“We're getting it ready for a new tenant as quickly as we possibly can,” McDonald said.

When we asked McDonald if she’d tell her next tenant about the meth lab she said, “I don't think I have to tell them. Word of mouth made sure of that.”

We asked Linda if we could test the apartment for any meth residue that may have been left behind from the lab, she agreed, and we got to work.

We tested both the upstairs and downstairs bathroom including light switches, toilets, counter tops and the shower.

The kits we ordered are from Meth Lab Cleanup Company, LLC and their results are sent to Forte Laboratories and are EPA certified.

We got ours within days. The results came back as 11.58 micrograms per 100 square centimeters.

Don't know what that means?

For comparison, many states require or recommend what's known as the California standard: a legal limit of meth residue of 1.5 micrograms per 100 square centimeters.

Remember, Linda's were 11.58. The expert we talked to said those readings were extraordinarily high.

We showed Dr. Tamas Peredy the results. He is the medical director at the northern New England Poison Control Center and believes a clean-up needs to be done at McDonald’s apartment before it’s safe to go back.

“Absolutely that's an environmental risk, and I would not recommend anyone be in that same airspace,” Peredy added.

He says depending on the levels and exposure length to meth residue can cause high blood pressure and lead to problems with the brain, heart and kidneys.

We asked Niles if people should be told if there was a meth lab in their home, he said absolutely.

Remember this is what McDonald had to say before we got the test results when we asked if she would tell future tenants about the meth lab: “I don't think I have to tell them. Word of mouth made sure of that.”

But even after we showed her the results, she still said she wouldn't tell her next renter.

“I need to rent that dog gone place. It's a dead horse to me right now. Nobody's living there and I've got to get it back on track,” McDonald explained.

She says she'll clean the place herself even though state police and poison control experts suggest she consult the health department or call in a professional cleaning company.